Is there any way to pass destination path as memory stream

Aspose.GIS Product Family
1

Hi,

I want to pass destinationpath as MemoryStream to VectorLayer.Convert for further use. If there is any option can you please share chunk of code.
I want to execute below code

var outputStream = new MemoryStream();
VectorLayer.Convert(shapefilePath, Drivers.Shapefile, outputStream , Drivers.GeoJson);

2

@naeem.akram

Yes, you can pass a MemoryStream as the destination path to the VectorLayer.Convert method. Below is a code snippet demonstrating how to achieve this:

using System;
using System.IO;
using Aspose.Gis;
using Aspose.Gis.Layers;

public class Example
{
    public static void Main()
    {
        string shapefilePath = "path/to/your/shapefile.shp"; // Specify your shapefile path
        using (var outputStream = new MemoryStream())
        {
            // Convert the shapefile to GeoJson and write to the MemoryStream
            VectorLayer.Convert(shapefilePath, Drivers.Shapefile, outputStream, Drivers.GeoJson);
            
            // Optionally, you can read the content from the MemoryStream
            string geoJsonOutput = System.Text.Encoding.UTF8.GetString(outputStream.ToArray());
            Console.WriteLine(geoJsonOutput);
        }
    }
}

In this example, the VectorLayer.Convert method is used to convert a shapefile to GeoJson format, and the output is written to a MemoryStream. After the conversion, you can read the contents of the MemoryStream as needed. Make sure to replace "path/to/your/shapefile.shp" with the actual path to your shapefile.

This approach allows you to handle the output in memory without needing to write it to a physical file on disk.

3

Above chunk of code is not working. I am getting error 'cannot convert from System.IO.MemoryStream to string. For reference please see attached, screen shot.
Error.png (226.8 KB)

4

@naeem.akram
Good day. I apologize, we are still testing our AI agent for quick answers and sometimes it turns out that the answers are not accurate. In any case, it is suggested that team members review the thread and leave a comment.
In your case, a working version of the code would be as follows:

string shapefilePath = "D:\\SomePath\\shapefile.shp"; // Specify your shapefile path
using (var outputStream = new MemoryStream())
{
     // Convert the shapefile to GeoJson and write to the MemoryStream
     VectorLayer.Convert(AbstractPath.FromLocalPath(shapefilePath), Drivers.Shapefile, AbstractPath.FromStream(outputStream), Drivers.GeoJson);

     // Optionally, you can read the content from the MemoryStream
     string geoJsonOutput = System.Text.Encoding.UTF8.GetString(outputStream.ToArray());

     Console.WriteLine(geoJsonOutput);
 }
5

@roman.charnashei
Thank you very much. I am facing another error like I want to convert file to memory stream for further actions in same way I want to read file from memory stream rather . For example in below cope I have opened and copied file to memory stream and then passing memory stream as input path but I am getting error ‘.SHX file is missing’ although I am using .shp file as input

string dataDir = RunExamples.GetDataDir();
string shapefilePath = dataDir + “InputShapeFile.shp”;
string jsonPath = dataDir + “output_out.json”;

MemoryStream ms = new MemoryStream();
using (FileStream file = new FileStream(shapefilePath, FileMode.Open, FileAccess.Read))
file.CopyTo(ms);

//ExStart: ConvertShapeFileToGeoJSON

//VectorLayer.Convert(shapefilePath, Drivers.Shapefile, AbstractPath.FromStream(cellsStream), Drivers.GeoJson);

using (var outputStream = new MemoryStream())
{
// Convert the shapefile to GeoJson and write to the MemoryStream
VectorLayer.Convert(AbstractPath.FromStream(ms), Drivers.Shapefile, AbstractPath.FromStream(outputStream), Drivers.GeoJson);

// Optionally, you can read the content from the MemoryStream
string geoJsonOutput = System.Text.Encoding.UTF8.GetString(outputStream.ToArray());

Console.WriteLine(geoJsonOutput);

}

For reference please find attached, error screen shot.
Error.png (384.6 KB)